Toho Seiko started selling its main products, LM Guides and ball splines.

Dec. 1972

Toho Seiko took over Nisshin Seisakusho Co., Ltd., and began operating the new acquisition as its Tokyo factory.

Mar. 1973

THK CO., LTD., was established by a joint investment between Toho Seiko and Miyairi Valve Seisakusho Co., Ltd.

Apr. 1977

Toho Seiko acquired the manufacturing department of THK CO., LTD., and began operating it as its Kofu plant.

Sept. 1979

Toho Seiko started manufacturing and selling ball screws.

Mar. 1981

THK America, Inc. (currently a consolidated subsidiary) was established in Chicago, Illinois, U.S.A.

July 1982

Toho Seiko started manufacturing and selling X-Y tables.

Oct. 1982

With a change in the face value of its shares (from 500 yen to 50 yen per share), Toho Seiko was taken over by THK CO.,LTD. (a pro forma merging corporation). The plants of Toho Seiko continued operation as THK's Nagoya and Osaka plants.

DALIAN THK CO., LTD. (currently a consolidated subsidiary), was expanded and moved to Dalian Economic and Technological Development Zone in China.

Sept. 2015

THK completed the business transfer of L&S (Linkage and Suspension) business of TRW Automotive Inc. (now part of ZF Friedrichshafen AG) in Europe and North America and the purchase of shares of its subsidiaries.

Oct. 2017

The headquarters was moved to the current location (2-12-10, Shibaura, Minato-ku, Tokyo).